Tank ventilation

Abstract

The invention relates to an internal combustion engine comprising a turbocharger between an air filter and a crankcase, a fuel tank, and a ventilation arrangement for the fuel tank, comprising a jet suction pump.

1 . An internal combustion engine with a turbocharger between an air filter and a crankcase, a motor vehicle tank, and a ventilation system for the fuel tank, comprising a jet suction pump, wherein said ventilation system has a charge air duct with a branch to the jet suction pump, wherein the inlet of said jet suction pump is connected with the fuel tank through the ventilation system, and the outlet of said jet suction pump is connected with the suction duct between the air filter and the turbocharger, wherein a propulsion jet coming from said charge air duct is pressed through a first nozzle, and the jet entrains gas at its circumference, and after the first stage, the volume flow, which was increased by the added air, subsequently flows through a second nozzle having a larger air cross section and a third nozzle having an even larger air cross section, a portion of the gas again being entrained. 
     
     
         2 . The internal combustion engine according to  claim 1 , wherein said jet suction pump has at least 4 stages. 
     
     
         3 . The internal combustion engine according to  claim 1 , wherein said jet suction pump is integrated into a cylinder head cover of a motor vehicle. 
     
     
         4 . The internal combustion engine according to  claim 1 , wherein said jet suction pump is made of plastic. 
     
     
         5 . The internal combustion engine according to  claim 1 , wherein said ventilation system has at least one bypass valve and/or one check valve in flow direction in parallel with the jet suction pump and between the fuel tank and the crankcase. 
     
     
         6 . The internal combustion engine according to  claim 1 , wherein the inlet of said jet suction pump is additionally connected with the crankcase through a second ventilation system. 
     
     
         7 . A method of using the jet suction pump in the internal combustion engine according to  claim 1  for ventilating the fuel tank in the internal combustion engine. 
     
     
         8 . The method of using the jet suction pump according to  claim 7  for simultaneously ventilating the crankcase. 
     
     
         9 . The internal combustion engine according to  claim 2 , wherein the jet suction pump has 5 stages. 
     
     
         10 . The internal combustion engine according to  claim 2 , wherein the jet suction pump has 6 or more stages. 
     
     
         11 . The internal combustion engine according to  claim 2 , wherein the jet suction pump is integrated into a cylinder head cover of a motor vehicle. 
     
     
         12 . The internal combustion engine according to  claim 2 , wherein said ventilation system has at least one bypass valve and/or one check valve in flow direction in parallel with the jet suction pump and between the fuel tank and the crankcase. 
     
     
         13 . The internal combustion engine according to  claim 3 , wherein said ventilation system has at least one bypass valve and/or one check valve in flow direction in parallel with the jet suction pump and between the fuel tank and the crankcase. 
     
     
         14 . The internal combustion engine according to  claim 4 , wherein said ventilation system has at least one bypass valve and/or one check valve in flow direction in parallel with the jet suction pump and between the fuel tank and the crankcase. 
     
     
         15 . The internal combustion engine according to  claim 4 , wherein said jet suction pump is made of polyamide. 
     
     
         16 . The internal combustion engine according to  claim 2 , wherein the inlet of said jet suction pump is additionally connected with the crankcase through a second ventilation system. 
     
     
         17 . The internal combustion engine according to  claim 3 , wherein the inlet of said jet suction pump is additionally connected with the crankcase through a second ventilation system. 
     
     
         18 . The internal combustion engine according to  claim 4 , wherein the inlet of said jet suction pump is additionally connected with the crankcase through a second ventilation system. 
     
     
         19 . The internal combustion engine according to  claim 5 , wherein the inlet of said jet suction pump is additionally connected with the crankcase through a second ventilation system.